go to the doctor
If you've ever had chicken pox, it almost sounds like shingles to me. I'm definitely no doctor, but my friend's wife had similar symptoms, and her doctor said shingles.
Could it be stress? Low blood pressure? <br />
I think you should see a doctor though. Even if it is stress, it is at a point something needs to be done about it.
Poor circulation? Can diabetes cause that? Blood clot? <br />
You will only get told to see your doctor.